i was bogged in mud and both wheels spun. this could either mean its limited slip or as a friend suggested - its in its dying stages. (he said on normal diffs when they are about to die both wheels will spin)

i was bogged in mud and both wheels spun. this could either mean its limited slip or as a friend suggested - its in its dying stages. (he said on normal diffs when they are about to die both wheels will spin)

what do you reckon?

Most fairmont ghia's have LSD's. Usually 2.92 ratio. If there is a tag it should tell you everything, if not try the tailshaft thing.

Most single spinners will spin both wheels if the load on them is the same, if one tyre grips better than the other it will lose power and the other will spin harder. (My XF only has a single spinner, but I have burnt rubber up both sides of my car right now!!)

Good question! I'm sorry to say I don't have any lists or any decent info whatsoever! The filler plug is the only way I know of checking. If its red, its ment to be a LSD, if its black its not. But even this can be wrong. Half the ford dealers would slap whatever they had lying around in the diff if they lost the plug. I've seen black plugs in LSD's before.

Based on the number on the tag i would say its a 3.11. I haven't heard of an XF with this ratio before, but hey i've heard stranger things!